Water-tube steam-generator.



A. BUGNON.

WATER TUBE STEAM GENERATOR. PPLIUATION FILED mms, 1909.

977,927. Patented Dec. 6,1910.

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UNITED sTATEs PATENT oEEicE.

ACHILLE BUGNON, OF PARIS, FRANCE.

WATER-TUBE STEAM-GENERATOR.

Application filed February 9, 1909.

T o all 'whom it may concern:

Be it known that I, ACHILLE BUGNoN, a citizen of the Republic of France, residing at 3 Rue Gerbier, Faris, in the Republic of France, engineer, have invented certain new and useful Improvements in Tater-Tube Steam-Generators, of which the following is a specification.

This invention has for its object to provide an improved water tube steam generator with practically instantaneous generation of steam.

The improved steam generator comprises a series of tubular steam-generating elements connected one to the other in the manner of a serpentine coil. and containing removable cores which reduce the cross section for the pesage of the water to a relatively narrow annular space. The annular space thus provided around the cores is divided longitudinally and transversely by means of projections or partitions formed either in the tube or on the core and so arranged as to compel the water to travel forward and backward several times along the length of each tube. f

Each steam-generating element consists of a tube having internal wings or ribs (hereinafter called wings) of any suitable form surrounding a plain core, or of a core having external wings or ribs (hereinafter called wings likewise of any suitable type contained in a plain tube, in combination with transverse partitions or projections arranged at the ends of the wings in an alternate manner so as, to form in each tube a serpentine passage way extending backward and forward several times from one end to the other of the core. This arrangement allows of obtaining a very long travel of the water in contact with the heated metal walls while employing only a small number of more or less short tubes. Compared with steam generators of similar type as constructed heretofore with or without internal wings it is therefore possible to obtain in this manner a much longer travel of the water or of the steam in the tubes while increasing the velocity of the fluids. This is advantageous for effecting a good utilization of the heat and the complete vaporization of the water with superheating of the generated steam. The increase in the velocity of circulation is also favorable to a clean condition of the tubes and to their gradual cooling and preservation.

Speccation of Letters Patent.

Patented Dec. 6, 1910.

Serial No. 477,008.

In particular, the improved system of cir-l culation prevents with certainty the tubes from becoming red-hot however intense the heat of the furnace may be.

Some forms of constructions of the improved steam generator are illustrated by way of example in the accompanying drawings, in which- Figure l is a longitudinal section of a tubular steam-generating element with triple circulation; Fig. 2, a cross-section of Fig. l on the line 2 2; Fig. 3, is a cross-section of the same on the line 3 3; Figs. 4 and 8 are developed views illustrating respectively the circulations in the elements shown in Figs. l and 5; Fig. 5 is a view similar to Fig. l showing an element with five-fold circulation; Figs. 6 and 7 are cross-sections of Fig. 5, on the lines 6-6 and 7 7 respectively.

In the arrangement shown in Fig. l the improved tubular steam-generating element consists of a plain tube l in the interior ofwhich there is inserted a core 2 of star shape in cross section with three ribs or wings 3, the edges of which fit the walls of 'the tube. The ends of the core 2 are provided with transverse partitions or projections 4. Recesses 5 and 6 are formed in the partitions 4 and in the wings 3 respectively for circulation of the water. These recesses are arranged alternately, as shown in Fig. 4, in such a manner that the water entering at one end of the tube is compelled to travel three times the length of the core 2. before arriving at the opposite end of the tube l. In this arrangement the elements are connected in pairs by means of a semi-circular union tubular connector 7 formed in one piece therewith. At the opposite end, each of these elements is connected to the next adjacent element by means of a removable connector 8 maintained in position by means of a screwed socket 9.

In the arrangement shown in Fig. 5, the improved element consists of a tube 1a having five internal wings 3a, with a plain cylindrlcal core 2a preferably hollow and closed at its two ends by means of plugs l0. In the upper part of Fig. 2 the core is assumed to have been removed. The circulation of the water in the tube la is determined by means of the partitions 4a, arranged near the ends of the tube and by means of the apertures 5a and 6a formed respectively in the partitions and the wings as shown in Fig. 3. The water entering by one of the apertures 5a is thus compelled to travel backward and forward live times the length ot' the tube bet'ore leaving b v the opposite aperture 5a. Each element is connected to the adjacent preceding element by means of a tubular connector l permanently lixed to the tubes l, and to the adjacent following element by means of a removable connector' 8 having the form of a transverse box fastened against the end of each tube by means ot' a bolt ll, the notched head l2 of which engages between projections 13 on the inner wall ot' the tube.

It is to be understood that this invention is not limited to the constructional forms above described and that the mode of grouping of the tubular elements, their arrangement for connecting them together, the shape and number of the wings or ribs of the tubes and of the cores ot these elements, etc., may be varied without departing from the nature of this invention.

W hat I claim, is-

l. A steam generator practically instantaneousA` comprising a series of steam generating tubular elements,each of which is composed of a tube, of a core in the said tube, of transversal partitions at the ends of the core and of longitudinal partit-ions between the core and the tube, each of the said transversal partitions having an apertureor opening for the purpose of putting the end ol the tube in communication with the space intervening between two of the longitudinal partitions, and the longitudinal partitions having openings arranged alternatively at their ends, save in the case ot' one of the longitudinal partitions which is wit-hout an opening, whereby a zigzag channel is formed in the tube.

2. In a steam generator the combination of a water tube, a central t-ube with two integral ends, radial wings solid with the water tube and resting against the central tube, and rings in the extremities ot' the water tube, the wings being notched alternately at one end and at the other so that a sinuous path is formed and each ring having a notch in its periphery for the passage of water.

In testimony, that I claim the foregoing as my invention, I have signed my name in presence of two subscribing witnesses.

ACHILLE BUG'NON.

Witnesses H. C. COKE, MAURICE IxoUx. 

